Cash flow information (Tables)

12 Months Ended

Dec. 31, 2018

Cash flow information

Schedule of reconciliation of net loss for the period to cash used in operations

	Year Ended December 31,
	2018		2017
	(in thousands)
Cash flows from operating activities:
Net loss	$	(1,945)	$	(3,892)
Adjustments to reconcile net loss to net cash used in operating activities:
Depreciation and amortization		1,171		952
Accretion of asset retirement obligation		163		196
Gain on trading securities		(92)		—
Asset write off		13		—
Gain on reduction of asset retirement obligation		—		(56)
Gain on sale of assets		(5,144)		(608)
Stock compensation		226		296
Changes in operating assets and liabilities:
Increase (decrease) in lease receivable		(167)		683
Increase in prepaid expenses and other assets		(10)		(142)
Decrease in inventories		13		3
Decrease (increase) in value added tax recoverable, net		127		(149)
(Decrease) increase in deferred revenue		(292)		892
Increase (decrease) in reclamation liability		24		(8)
Increase in accounts payable and accrued liabilities		236		226
Decrease in deferred leasehold payments		(34)		(23)
Net cash used in operating activities	$	(5,711)	$	(1,630)